Wire stripping machine



y 1946. R. GORDON WIRE STRIPPING" MACHINE Filed Oct. 27, 1944 I 4 wimp??? M REUBEN GORDON MYWFAEK IN V EN TOR.

, and sold at a reasonable cost.

Patented May 28, 1946 WIRE sTRIPPmGMAcHmE Reuben Gordon, Seattle, Wash.';now by judicial change of name Robert Gordon Application ct. 27, 1944, Serial No. 560.689 I 7 Claims. (01. 81-951) new and useful improvements in a wire stripping machine.

More specifically, the invention proposesthe construction of a. wire stripping machine which is foot operated and which is capable of cutting through insulation and the end of a piece of wire with a minimum of effort on the part of the operator regardless of the thickness or toughness of the insulation applied to the wire,v

Another object of the invention proposesthe construction of a wire stripping machine'characterized by a bracket having spaced arms upon which a driving plate is rotatively mounted to be driven by a verticalrack adapted to be pulled downwards by a foot operated lever.

Another object of the invention proposes the provision of a driven plate rotatively mounted on the other of the arms and carrying a plurality of cutting knives radially on and which are adapted to move inwards to cut the insulation of a piece of wire under influence of the .rotative action of the driven plate.

Still another object ofthe invention proposes the provision of a relationship between the driven plateand the driving plate for causing the driven plate to rotate with the driving plate upon completion of the movement of the cutting blade to out completely around the insulation while the wire is being held stationary.

Still another object of the invention proposes that the piece of wire, after having theinsula: tion cut by the blades, be pulled from the stripping machine to strip the freed piece of insulation material from the end of the wire.

It is another object of thisinvention to construct a wire stripping machine which is simple and durable and which may be manufactured This invention relates to For further comprehension of the invention, and of the objects and advantages thereof, reference will be had and accompanying drawing, and to the appended claims in which the various novel features of the invention. are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure}; l l

Fig. 1 is a side elevational view of l a wire stripping machine constructed infaccordance with this invention.

Fig. 2 is a partial verticalsectional 'view taken:

on the line 2-2 of Fig. 1. l 1 Fig. 3 is a vertical sectional view taken on the line -33 of Fig. 2.

Fig. 4 is a vertical sectional View taken on the line 4 -4 ofFig. 2. m j

slidably mounted thereto the followingdescription The wire stripping machine, according to this invention, includes a table lll upon which a U shaped bracket II is fixedly mounted. The U- shaped bracket ll includes spaced upwardly extending arms ['2 and 13.

A drivingplate I4 is'rotatively mounted on one of the arms of the U-shaped bracket II. The driving plate I4 is preferablymounted uponthe arm 12. V The driving plate lA is rotatively supportedon a tube i5 extended through the arm 12 and retained in a, fixed; a collar. [6 which bears against the outer face of the arrnlZ. H A set screw 11. holds the collar ifi inqa fi xed desired adjusted position on the tube I 5.

dr venplate i8 is .rotati e y nt on th other arm. H! of the U-shaped bracket ll coaxially of the 'driving plate I 4. The driven plate 18 is forme With a t bular pro ect on 9 w h extends through .a collar 20 and through an opening formed in. the arm l3. The collar 20 maintains the driven-plate; |8 in a desired rotative spaced position with relation to the arm l3. A second collar zl is mounted upon the extended end of the tubular projection Ill-and is retained in a fixed position by a set screw 22.

,A plurality of cutting blades 23. are radially slidably mounted on the driven;plate I8. The blades 23 are radially slidably supported by means of pins- 24 and 25. which project through slots 26 formed in the drivengplate l8. These pins 24 and 25 which engage the. slots 26 permit inward and outward radial movement of the blades 23. The cutting blades 23 have their cuttingedges disposed adjacent each other to engagethe insulation in a'complete circle about the wired l The pins 25 have greatly extended ends which engage spiral-like cam slots '2'! driving plate It. Asthe driving plate I4 is turned these spiral-like cam slots 21 will move the pins 24 inwards similarly moving the cutting blades 23 along the length of the slots 26. Thus movement of the driving plate M will urge the cutting blades 23 inwards. A stop. plate 28 is provided in connection with the driving 'plate l lforcutting 01f portions of the cam slots 2'! and for locking the driven plate l8 to the driving plate l4 upon complete inward movement of the cuttingblades 23 tocause the driven plate I8 to rotate with the driving plate l4. This stop plate 28 is rotatively supported on the tubular member I5 adjacent the driven plate l8 and has radial projecting portions29 one for each ofthe cam position by means of formed in the limiting movement of the pins 24.

slots 21. In certain turned positions of the stop plate 28 the pins25 will strike the projecting portions 29 preventing furthermovement along the length of the cam slots 21 to cause further rotations of the driving plate Hi to rotate the driven plate |8. An adjustable mean is provided for holding the stop plate 28 in various adjusted positions relative to the driven plate l4. This means comprises an extension 39 on one of the radially extending portions 29 of the stop plate and on which extension is formed an arcuate slot 3|. This arcuate slot 3| is arranged concentric with the turning point of the stop plate 28. A screw 32 passes through the arcuate slot 3| and threaded- 1y engages a complementary opening in the driving plate l4 for holding the stop-plate 28 in various adjustedpositions relative to the. inner ends 7 of the spiral-like cam slots 21.

Means is provided in connection with the driven plate l8 for holding the driven plate against free rotation and to prevent it from turning until such time as the pins strike the radial projecting portions 29 of the stop plate 28. This means comprises a gear 33 which is rotative- 1y supported on the end of an arm 34 which is piv- Otally supported on a lug 35 which projects from the arm l3 of the U-shaped bracket The gear 33 meshes with complementary gear teeth 36 formed on the periphery of the driven plate l8. Resilient means is provided for pivoting the arm 34 to cause the gear 33 to bear rigidly against the periphery of the driven plate I8. This means comprises a leaf spring 31 having one end fixedly attached to the lug 35 and its other end bearing against the arm 34. c

The wire to be stripped is adapted to be inserted through the tubular projection l9 or the driven plate |8 and into the tubular member H) which rotatably supports the driving plate l4. This will bring the wire into a position between the inner ends of the cutting plates 23. Means is provided in the form of an adjustable stop for controlling the extent to which the wire to be stripped may be inserted into the passages l3 and I9. This means comprises a support 38 mounted on the outer face of the arm I2 of the U-shaped bracket l and having an upwardly extended portion projecting across the outer end of the tubular member |5. A screw 39 is threadedly extended through the upwardly extended portion of the support 33 and has its free end freely projected into the outer end of the'tubular member IS. A knob 40 is mounted on the outer end or the screw 39 and provides a grip for turning the screw to adjust its position within the end of the tubular member |5. It will be greatly understood that the end of the wire projected into the passages of the tubular members I5 and I9 will strike the inner end of the screw 39 and limit further inward projection of the Wire into the passage. Adjusting the position of the screw will control the degree to which the end of the wire may be projected into the passages and the amount of insulation that will be stripped from the end by blades 23.

Means is provided for turning the driving blade M in one direction or the other. This means comprises a vertical slidably mounted rack: 4| which meshes with a complementary gear portion 42 formed on the side of the driving plate l4. The bottom end of the rack 4| extends through an opening 43 formed in the bottom of the U- shaped bracket H and in the top of the table l9. At its bottom end the rack 4| is pivotally connected to an intermediate area of a horizontal -until the pins 24 strike pivotally mounted foot lever 44. The foot lever 44 is adapted to be depressed by the operators foot for pulling the rack 4| downwards to rotate the driving plate l4.

Resilient means is provided for returning the rack 44 to its starting position to turn the driving plate l4 back to its starting position. This means comprises a contraction spring 45 which operates between a pin 46 extending from a portion of the rack 4| and a lug 41 mounted on the bottom face of the top of the table in. The movement of. the rack 4| downwardly through the medium of the foot lever 44 will expand and load the spring 45 to supply the necessary power to move the rack 4| upwards when the foot lever 44 is released.

The operation of the device is as follows:

The screw 39 is properly adjusted and the end of the'wire from which the insulation is to be removed is inserted into the passages of the tubular members l5 and I9 until it strikes the inner end of the screw 39. The foot lever 44 is then depressed turning the driving plate M to move the cutting blades 23 inwards on the driven plate I8 to cut into the insulation of the wire. Rotations of the driving plate l4 are continued the radially projecting of the stop plate 28. This will lock the driven plate l8 to the driving plate |4 causing it to rotate therewith. The tensioning gear 33 functions to hold the driven plate l8 against rotating until such time as the pins 25 strike the projection 29. When the driven plate i8 rotates the cutting blades 23 will rotate therewith and out completely around'the insulation of the wire. With the foot lever 44 depressed the wire is pulled out of its position in the tubular members Hi and I9 causing the cut end of the insulation to be stripped from the end of the wire. After the wire is pulled out the foot lever 44 is released and the spring 45 will return the parts to their starting position. The stripped piece of insulation may then be removed from thepassage of the tubular members I5 and I9 clearing the device to receive the end of another piece of wire to be stripped. The device may be provided with a mechanical or air operated means for ejecting the stripped piece of wire from the passages of the tubular portions I5 and I9.

While I have illustrated and described the preferred embodiment of my invention, it is to be understood that'I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent, is:

1. A wire stripping machine, comprising a bracket having spaced arms, a driving plate rotatively mounted on one of said arms and having a coaxial passage and a plurality of spirallike cam slots, a driven plate rotatively mounted on the other of said arms coaxially of said driving plate and having a coaxial passage, 2. plurality of cutting blades radially slidably mounted on said driven plate and provided with pins eng ging said cam slots, a stop plate having portions overlying said slots and adjustably mounted on said driving plate for cutting off portions of said cam slots, said pins engaging said overlying portions of said stop plate, means connected with said drivenplate for locking it temporarily so that a force is required to turn said driven plate,

portions 29 an adjustable stop for controlling the extent to which a wire to be Stripped may be inserted into said passages, and means for turning said driving direction and then back.

3. A Wire stripping machine, comprising a bracket having spaced arms, a driving plate rtatively mounted on one of said arms and having a coaxial passage and a plurality of spirallike cam slots, a driven plate rotatively mounted on the other of said arms coaxially of said driving plate and having a coaxial passage, a plurality of cutting blades radially slidably mounted on said driven plate and provided with pins engaging said cam slots, a stop plate having portions overlying said slots and adjustably mounted on said driving plate for cutting ofi portions of said cam slots, said pins engaging said overlying portions of said stop plate, means connected with said driven plate for looking it temporarily so that a force is required to turn said driven plate, an adjustable stop for controlling the extent to which a wire to be stripped may .be inserted into said passages, and means for turning said driving plate in one direction and then back, said stop plate being formed with radial projecting portions one for each of said cam slots.

4. A wire stripping machine, comprising a bracket having spaced arms, a driving plate rotatively mounted on one of said arms and having a coaxial passage and a plurality of spiral-like cam slots, a driven plate rotatively mounted on the other of said arms coaxially of said driving plate and having a coaxial passage, a plurality of cutting blades radiallyslidably mounted on said driven plate and provided with pins engaging said cam slots, a stop plate having portions overlying said slots and adjustably mounted on said driving plate for cutting off portions of said cam slots, said pins engaging said overlying portions of'said stop plate, means connected with said driven plate for looking it temporarily so that a force is required to turn said driven plate, an adjustable stop for controlling the extent to which a wire to be stripped may be inserted into said passages, and means for turning said driving plate in one direction and then back, and a screw passing through an arcuate slot formed in a portion of said stop blade and threadedly engaging a complementary opening in said driving plate and comprising the means for adjustably holding said stop plate.

5. A wire stripping machine, comprising a bracket having spaced arms, a driving plate rotatively mounted on one of said arms and having a coaxial passage and a plurality of spiral-like cam slots, a driven plate rotatively mounted on to be stripped may be inserted into said passages,

and means for turning said driving plate in one direction and then back, said tension means comgrip said gear teeth.

lying said slots and adjustably mounted on said driving plate for cutting off portions of said justed stop comprising a rotatively supported screw extended into one end of said passage to be passage, a plurality of cutting blades radially slidably mounted on said driven plate and provided with pins engagsaid driven plate for locking that a force is an adjustab required to turn said driven plate, stop for controlling the extent to V REUBEN GORDON.

it temporarily so 

